28088849 has 8 divisors (see below), whose sum is σ = 29189160. Its totient is φ = 26997376.

The previous prime is 28088843. The next prime is 28088861. The reversal of 28088849 is 94888082.

It can be written as a sum of positive squares in 4 ways, for example, as 1380625 + 26708224 = 1175^2 + 5168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28088849 - 2⁴ = 28088833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28088843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4679 + ... + 8835.

It is an arithmetic number, because the mean of its divisors is an integer number (3648645).

Almost surely, 2^28088849 is an apocalyptic number.

28088849 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28088849 is a deficient number, since it is larger than the sum of its proper divisors (1100311).

28088849 is a wasteful number, since it uses less digits than its factorization.

28088849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419.

The product of its (nonzero) digits is 294912, while the sum is 47.

The square root of 28088849 is about 5299.8914139820. The cubic root of 28088849 is about 303.9797460248.

The spelling of 28088849 in words is "twenty-eight million, eighty-eight thousand, eight hundred forty-nine".